Implement some channel endpoints for APIv4 (#5767)

api4/channel.go

@@ -17,21 +17,26 @@ func InitChannel() {
 
 	BaseRoutes.Channels.Handle("", ApiSessionRequired(createChannel)).Methods("POST")
 	BaseRoutes.Channels.Handle("/direct", ApiSessionRequired(createDirectChannel)).Methods("POST")
+	BaseRoutes.Channels.Handle("/members/{user_id:[A-Za-z0-9]+}/view", ApiSessionRequired(viewChannel)).Methods("POST")
 
 	BaseRoutes.Team.Handle("/channels", ApiSessionRequired(getPublicChannelsForTeam)).Methods("GET")
 
 	BaseRoutes.Channel.Handle("", ApiSessionRequired(getChannel)).Methods("GET")
 	BaseRoutes.Channel.Handle("", ApiSessionRequired(updateChannel)).Methods("PUT")
 	BaseRoutes.Channel.Handle("", ApiSessionRequired(deleteChannel)).Methods("DELETE")
+	BaseRoutes.Channel.Handle("/stats", ApiSessionRequired(getChannelStats)).Methods("GET")
+
+	BaseRoutes.ChannelForUser.Handle("/unread", ApiSessionRequired(getChannelUnread)).Methods("GET")
+
 	BaseRoutes.ChannelByName.Handle("", ApiSessionRequired(getChannelByName)).Methods("GET")
 	BaseRoutes.ChannelByNameForTeamName.Handle("", ApiSessionRequired(getChannelByNameForTeamName)).Methods("GET")
 
 	BaseRoutes.ChannelMembers.Handle("", ApiSessionRequired(getChannelMembers)).Methods("GET")
+	BaseRoutes.ChannelMembers.Handle("/ids", ApiSessionRequired(getChannelMembersByIds)).Methods("POST")
 	BaseRoutes.ChannelMembersForUser.Handle("", ApiSessionRequired(getChannelMembersForUser)).Methods("GET")
 	BaseRoutes.ChannelMember.Handle("", ApiSessionRequired(getChannelMember)).Methods("GET")
 	BaseRoutes.ChannelMember.Handle("", ApiSessionRequired(removeChannelMember)).Methods("DELETE")
 	BaseRoutes.ChannelMember.Handle("/roles", ApiSessionRequired(updateChannelMemberRoles)).Methods("PUT")
-	BaseRoutes.Channels.Handle("/members/{user_id:[A-Za-z0-9]+}/view", ApiSessionRequired(viewChannel)).Methods("POST")
 }
 
 func createChannel(c *Context, w http.ResponseWriter, r *http.Request) {
@@ -207,6 +212,53 @@ func getChannel(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+func getChannelUnread(c *Context, w http.ResponseWriter, r *http.Request) {
+	c.RequireChannelId().RequireUserId()
+	if c.Err != nil {
+		return
+	}
+
+	if !app.SessionHasPermissionToUser(c.Session, c.Params.UserId) {
+		c.SetPermissionError(model.PERMISSION_EDIT_OTHER_USERS)
+		return
+	}
+
+	if !app.SessionHasPermissionToChannel(c.Session, c.Params.ChannelId, model.PERMISSION_READ_CHANNEL) {
+		c.SetPermissionError(model.PERMISSION_READ_CHANNEL)
+		return
+	}
+
+	channelUnread, err := app.GetChannelUnread(c.Params.ChannelId, c.Params.UserId)
+	if err != nil {
+		c.Err = err
+		return
+	}
+
+	w.Write([]byte(channelUnread.ToJson()))
+}
+
+func getChannelStats(c *Context, w http.ResponseWriter, r *http.Request) {
+	c.RequireChannelId()
+	if c.Err != nil {
+		return
+	}
+
+	if !app.SessionHasPermissionToChannel(c.Session, c.Params.ChannelId, model.PERMISSION_READ_CHANNEL) {
+		c.SetPermissionError(model.PERMISSION_READ_CHANNEL)
+		return
+	}
+
+	memberCount, err := app.GetChannelMemberCount(c.Params.ChannelId)
+
+	if err != nil {
+		c.Err = err
+		return
+	}
+
+	stats := model.ChannelStats{ChannelId: c.Params.ChannelId, MemberCount: memberCount}
+	w.Write([]byte(stats.ToJson()))
+}
+
 func getPublicChannelsForTeam(c *Context, w http.ResponseWriter, r *http.Request) {
 	c.RequireTeamId()
 	if c.Err != nil {
@@ -326,6 +378,31 @@ func getChannelMembers(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+func getChannelMembersByIds(c *Context, w http.ResponseWriter, r *http.Request) {
+	c.RequireChannelId()
+	if c.Err != nil {
+		return
+	}
+
+	userIds := model.ArrayFromJson(r.Body)
+	if len(userIds) == 0 {
+		c.SetInvalidParam("user_ids")
+		return
+	}
+
+	if !app.SessionHasPermissionToChannel(c.Session, c.Params.ChannelId, model.PERMISSION_READ_CHANNEL) {
+		c.SetPermissionError(model.PERMISSION_READ_CHANNEL)
+		return
+	}
+
+	if members, err := app.GetChannelMembersByIds(c.Params.ChannelId, userIds); err != nil {
+		c.Err = err
+		return
+	} else {
+		w.Write([]byte(members.ToJson()))
+	}
+}
+
 func getChannelMember(c *Context, w http.ResponseWriter, r *http.Request) {
 	c.RequireChannelId().RequireUserId()
 	if c.Err != nil {